Tread-roller



P. H. WILKINSON.

TREAD ROLLER.

APPLICATION men AUG-9,1919.

1,400,474, v v Patented Dec.13, 1921.

4 v luvs/won PAUL IiW/urms N UNITED STATES PAUL H. XVILKINSON. OF SAN BERNARDINO, CALIFORNIA.

BREAD-ROLLER.

Specification of Letters ?atent.

Applicationfiled August 9, 1919. Serial No. 316,449.

To all whom it may concern:

Be it known that 1, PAUL H. W ILKINSON, a citizen of the United States, residing at San Bernardino, in the county of San Bernardino and State of California, have invented new and useful Improvements in Tread-Rollers, of which the following is a specification.

My object is to make a tread roller, and my invention consists of the novel features herein shown, described and claimed.

Figure 1 is a side elevation of a tread roller embodying the principles of my invention in use, the tire casing being shown in section.

Fig. 2 is a fragmentary front elevation looking in the direction indicated by the arrow 2 in Fig. 1.

Fig. 3 is a vertical cross section on the line 33 of Fig. 1.

Fig. 4 is a fragmentary view analogous to Fig. 2 and showing a diflerent operation.

Referring to the drawing in detail, the base plate 1 has a flat lower face to fit upon a bench 2 and be held in place by screws 3 and 1. The pedestal 5 extends upwardly from the back end of the base 1 and has a bearing 6 in its upper end. The pedestal 7 extends upwardly from the forward end of the base 1 and has a bearing 8 at its upper end, the bearing 8 being in a lower plane than the bearing 6 and at right angles there: to. The pedestal 7 extends upwardly beyond the bearing 8 and has a flat upper supporting face 9. The supporting arm 10 extends forwardly from the base 1 and from the lower end of the pedestal 7 and the head 11 extends upwardly from the forward end of the supporting arm 10. A stub shaft 12 is fixed in the head 11 and a crown faced roller 13 is rotatably mounted upon the stub shaft 12. The roller 13 is adapted to fit the inner face 1 1' of the tread portion of a tire casing 15, and when the tire casing is in place the beads 16 and 17 are spread apart to allow the head 11 and roller 13 to pass between the beads.

The operating shaft support 18 is a long shaft bearing having a hinge bearing 19 extending downwardly from its rear end. The bearing 6 is bifurcated and the hinge bearing 19 fits in the bifurcation and the hinge pin 20 is inserted through the bearing 6 and through the bearing 19, so that the forward end of the shaft bearing 18 may swing upwardly from its normal position. A lug 21 extends downwardly from the forward end of the shaft bearing 18 to engage the face 9 of the pedestal 7 when the shaft bearing is down in its normal position, as in Fig. 1.

The concaved roller 22 is mounted upon an operating shaft 23 and has a hub 24 carrying a set screw 25 so that by loosening the set screw the roller may be adjusted upon the shaft to fit in opposition to the roller 13. The roller 22 is adapted to fit the gum rubber 26 for forming a new tread upon the casing 15. The hand crank 27 is fixed upon the forward end of the shaft 23 for operating the shaft tooperate the roller 22. The shaft 23 is inserted through the shaft bearing 18 and is held rotatably in place by a set screw 28 running freely in a groove 29 in the shaft, the set screw being tapped through the wall of the bearing 18.

A lug 30 extends laterally from the forward end of the shaft bearing 18 and has a vertical slot 31 and a flat upper face 32. The clamping screw 33 has a pintle 34; extending at right angles from its lower end and fitting in the bearing 8, and the clamping screw is adapted to fit in the slot 31 and extend upwardly above the lug 30. A nut 35 is screw seated upon the upper end of the screw 33 and adapted to engage the upper face 32 of the lug 30, and the handwheel 36 is formed integral with the nut 35, so that when the handwheel 36 is operated to loosen the nut 35 the adjusting screw 33 may be turned laterally out of the slot 31. and swing downwardly, as shown in Fig. 4:, and then the forward end of the operating shaft 23 may be raised, the shaft bearing 18 turning upon the pivot pin 20, so that the casing 15 may be passed between the rollers 13 and 22, and so that when the casing is in place upon the roller 13 the forward end of the shaft 23 may be lowered to bring the roller 22 against the tread face 26. The adjusting screw 33 may be elevated into the slot 31 and the handwheel operated to tighten the nut 35 to press the lug 21 downwardly against the face 9 and hold the shaft bearing 18 rigid while the crank 27 is operated to roll the tread upon the casing.

In the operatlon of retreading tire casings the old tread is removed from the easing and new gum rubber applied to form the new tread. The gum rubber comes in sheets an eighth. of an inch or a quarter of an inch thick, and these sheets are cut into strips of the desired width. One side of the rubber is Patented Dec. 13, 1921. a

tacky and the other side is non-tacky. A strip 37 is placed in position upon the casing 15 with the tacky side against the casing and the non-tacky side outwardly and the casing placed in position with the roller 13, fitting inside of the casing; and the roller 22 fits the non-tacky outer face of the strip 37 of the gum rubber; then the crank 27 is operated to the desired extent to roll the strip 37 firmly upon the casing to make the strips stick and to drive out the air pockets; then another strip is applied and rolled'and another applied and rolied until the desired tread has been built up ready for vulcanizingp As the crank27 is operated the casing 15 will travel around and around.

Various changes may be made without departing-from the spirit of my invention as claimed.

I claim: a

1. A tread roller comprising a base, a pedestal extending upwardly from the rear end of the base, second pedestal extending upwardly from the forward end of the base, an arm extending forwardly from the lower end of the second pedestal, a head extending upwardly from the forward end of the arm,

a crown roller supported by the head, an operating shaft bearing pivotally connected to the first pedestal and adapted to rest upon the second pedestal, means for removably connecting the forward end of the shaft bearing to the second pedestal, an operating shaft mounted in the shaft bearing, a c0ncave roller upon the operating shaft in opposition to the crown roller, and means for rotating the operating shaft.

2. A tread roller comprising a crown roller mounted in position to receive a tire casing and allow the tire casing to travel upon the roller, a shaft, a concave roller on said shaft for engaging thetread of said casing, a pivotally mounted bearing in which said shaft is journaled whereby said concave roller may be swung into or out of engagement with the tread of said tire casing, a bifurcatedlug on said bearing, a pivotally mounted screw adapted to be swung into or out of the bifurcation of said lug, and a nut on said screw for engaging aid lug to hold said concave roller in engagement with the tread of said casing. v

I 3. in a tread roller, the combination of a frame provided with an upwardly projecting arm,a crown roller journaled on a horizontal axis upon said arm and adapted to receivea tire casing, a shaft bearing pivotally mounted on said frame, a manually operable shaft revolubly mounted in said bearing, a concave roller mounted on said 7 shaft for engaging the tread of the tire casing, said roller adapted to be swung on said shaft to effect engagement ori disengagement with the tire tread, and manually operable means on the frame for engaging said bearing to hold the concave roller in engagement with the tire tread. l. in a tread roller, the combination of a frame provided with an upwardly projecting arm, a crown roller journaled on a lIOIlzontal axis upon said arm and adapted to receive a tire casing, a shaft bearing pivotally mounted on said frame, ainanually operable shaft revolubly mounted in said bearing, a concave roller mounted on said shaft for engaging the tread of the tire casing, said roller adapted to be swung on said shaft to effect en agement or disengagement with the tire tread, and manually operable means on the frame ror engaging said hearing to hold the concave roller in adjustable engagement with the tire tread. a

5. in a tread roller, the combination of a frame, a crown roller mounted on said frame to support a tire casing relatively movable thereon, a shaft bearing pivotally mounted on said frame with its axis parallel to the axis of the crown roller, a shaft revolubly mounted in said bearing, a concave roller rigidly mounted on said shaft and adapted to engage the tread of the tire casing, means to cause the casingto travel between said rollers, the shaft adapted to be swung in its pivoted bearing to effect engagement or disengagement of the concave roller with the tread of the-tire casing, and means to hold said concave roller in adjustable engagement with the said tread. r

6. In a tread roller, the combination of a frame, a crown roller mounted on said frame to support a tire casin relatively movable thereon,-a shaft bearing pivotally mounted on said frame with its axis parallel to the axis of the crown roller, a shaft revolubly mounted in said bearing, a concave roller rigidly mounted on said shaft andadapted to engagethe tread of the tire casing, a crank for rotating said shaft, the shaft adapted to be swung in its pivoted bearing to effect engagement or disengagement of the concave roller with the tread of the tire casing, clamp screw pivotally mounted on the frame adapted to on e said lug to hold the concave roller in adjustable engagement'with the tire tread. i

In testimony whereof I have signed my name to this specification.

PAUL n. WILKINSON.

bifurcatedlug on said bearing, a 

